通知公告

(6.28)学术报告:Bulk Thermoelectric and Thermodynamic Probes of non-Abelian Anyons in TopologicalSystems

报告人:杨昆 教授

YangKun.jpgNational High Magnetic Field Laboratory and Florida State University, Tallahassee, Florida USA

报告地点:强磁场中心磁体楼201会议室

报告时间628日上午1000 (星期五)

个人介绍:杨昆教授于1989年毕业于复旦大学物理系,1994年获得美国印第安纳大学理学博士学位。1994-99年期间分别在美国普林斯顿大学和加州理工学院从事博士后研究,1999年至今一直就职于美国国家强磁场中心和弗洛里达州立大学物理系,长期从事凝聚态物理和统计物理的理论研究。他的主要兴趣集中在强关联多体电子系统(如量子Hall系统、非常规超导和无序量子磁体等)、相变和量子临界现象等。在研究中发表论文100多篇,在重要国际会议邀请报告38次,学术交流邀请报告98次。曾获得美国斯隆研究奖(Alfred P. Sloan Research Fellowship),海外华人物理协会OCPA杰出青年研究(Outstanding Young Researcher Award)等荣誉,并于2011当选美国物理学会会士 (APS Fellow)

在拓扑系统中非阿贝尔任意子的热电和热力学探测

Bulk Thermoelectric and Thermodynamic Probes of non-Abelian Anyons in TopologicalSystems

Topological states of matter support quasiparticle excitations with fractional charge and possibly exotic statistics of thenon-Abelian type, known as non-Abelian anyons. Most current experimental attempts to reveal such exotic statistics focus on interference involving edge transport. After a brief introduction of topological states, in this talk we will discuss how one can reveal the non-Abelian quasiparticle statistics in bulk probes. We show that bulk thermopower is a promising way to detect their non-Abelian nature, and measure the quantum dimension (a key parameter that quantifies non-Abelian statistics) of these anyons. We also demonstrate a novel cooling effect associated with them. We discuss application of these ideas to the specific candidate system of FQH liquid at filling factor 5/2, and topological insulator-superconductor hybrid systems. Some of the predicted behavior has been observed in recent experiments, which will also be discussed.
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